Sleeve, particularly a rod sleeve

Abstract

A sleeve ( 1 ), particularly a rod sleeve, at least consisting of a core comprising a core hub ( 2 ) that has two faces ( 3 ), and comprising a core pin ( 4 ), which extends in the direction of longitudinal axis Y and which projects over both faces of the core hub while forming two connecting journals ( 5 ). The inventive sleeve also consists of an outer sleeve ( 6 ) and of an elastic layer ( 7 ) located between the core hub ( 2 ) and the outer sleeve ( 6 ). The core hub ( 2 ) and the core pin ( 4 ) form a one-piece core system that is provided, however, in two parts with regard to the normal X to the longitudinal axis Y, whereby both core halves (A 1 , A 2 ) are assembled with interference fit by means of an insertion-slot system ( 8 ). The core hub ( 2 ) between its two faces ( 3 ) undergoes a tapering with an angle changeα, whereby the respective contact surfaces ( 9, 10 ) of the core hub and of the outer sleeve ( 6 ) extend in a manner that essentially corresponds to the elastic layer ( 7 ). The outer sleeve ( 6 ) and the elastic layer ( 7 ) are provided in two parts with regard to the normal X to the longitudinal Y. Both sleeve halves (B 1 , B 2 ) are assembled with interference fit by means of an insertion-slot system ( 11 ), whereas both elastic layer halves (C 1 , C 2 ) are placed at a distance L 1 from one another.

1. A rod sleeve for coupling a wheel set guide arm to a rail vehicle frame, the rod sleeve comprising:
 (a) a metal or plastic core having a longitudinal axis Y and a normal axis X, and formed from two core halves assembled with an interference fit by an insertion slot system, said core comprising: 
 (i) a core hub having two opposite faces with respective diameters D 1  and D 2 , and a tapered region disposed between said two opposite faces, said tapered region having an angle α with respect to said longitudinal axis Y and forming a diameter D 3  at a central portion of said core hub; and  
 (ii) a core pin projecting out from each of said two opposite faces along said longitudinal axis Y and forming two connecting journals;  
 
 (b) a metal or plastic outer sleeve disposed around said core hub and formed from two sleeve halves assembled with an interference fit by an insertion slot system, said outer sleeve having a total length L along said longitudinal axis Y and an outside diameter D; and  
 (c) an elastic layer disposed between said outer sleeve and said core hub and formed from two elastic layer halves spaced a distance L 1  from one another, said elastic layer having a total length L 2  along said longitudinal axis Y, including said distance L 1 , wherein said total length of said elastic layer L 2  is less than said total length of said outer sleeve L;  
 
     Wherein a contact surface of said core hub and a contact surface of said outer sleeve extend in a manner essentially corresponding to said elastic layer. 
   
   
     2. The rod sleeve according to  claim 1 , wherein said elastic layer comprises an elastomer material or a thermoplastic elastomer. 
   
   
     3. The rod sleeve according to  claim 2 , wherein said elastomer material comprises natural rubber. 
   
   
     4. The rod sleeve according to  claim 1 , wherein a thickness of said elastic layer is essentially constant. 
   
   
     5. The rod sleeve according to  claim 1 , wherein a thickness of said elastic layer is 3 mm to 30 mm in an unstressed state. 
   
   
     6. The rod sleeve according to  claim 1 , wherein said angle α of the hub tapering is 20° to 80°. 
   
   
     7. The rod sleeve according to  claim 1 , wherein said distance L 1  between both elastic layer halves comprises approximately an entire center hub region with the third diameter D 3 . 
   
   
     8. The rod sleeve according to  claim 1 , wherein a ratio of said diameter D 1  or D 2  to D 3  comprises the following value range:
 D 1  or D 2 : D 3 =3:1 to 1.5:1.  
 
   
   
     9. The rod sleeve according to  claim 1 , wherein a ratio of said total length L of said outer sleeve to said distance L 1  between both elastic layer halves comprises the following value range:
 L:L 1 =3:1 to 10:1.  
 
   
   
     10. The rod sleeve according to  claim 1 , wherein a ratio of said total length L and said outside diameter D of said outer sleeve comprises the following value range:
 L:D=1:2 to 2:1.  
 
   
   
     11. The rod sleeve according to  claim 1 , wherein a thickness of said elastic layer is 10 mm to 20 mm in an unstressed state. 
   
   
     12. The rod sleeve according to  claim 1 , wherein said angle α of the hub tapering is 30° to 60°. 
   
   
     13. The rod sleeve according to  claim 1 , wherein a ratio of said diameter D 1  or D 2  to D 3  comprises the following value range:
 D 1  or D 2 :D 3 =2.5:1 to 2:1.  
 
   
   
     14. The rod sleeve according to  claim 1 , wherein a ratio of said total length L of said outer sleeve to said distance L 1  between both elastic layer halves comprises the following value range:
 L:L 1 =5:1 to 10:1.  
 
   
   
     15. The rod sleeve according to  claim 1 , wherein a ratio of said total length L and said outside diameter D of said outer sleeve comprises the following value range:
 L:D=1.5:1.